Biology Respiration / Gaseous Exchange ETEA 2022
PMDC Verified Question 18 of 34
The average adult human has a lung capacity of approximately:
A
\( 5 \text{ liters} \)
B
\( 2 \text{ liters} \)
C
\( 9 \text{ liters} \)
D
\( 12 \text{ liters} \)
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: \( 5 \text{ liters} \)
Concept: Total Lung Capacity (TLC) is the maximum volume of air the lungs can hold after a maximal forced inspiration.

Solution:
  • TLC is calculated as the sum of Vital Capacity (VC) and Residual Volume (RV).
  • In a healthy, average-sized adult, this total volume ranges between \( 5 \) to \( 6 \text{ liters} \) (\( 5000 \text{ - } 6000 \text{ mL} \)).


Why other options are incorrect:
  • \( 2 \text{ liters} \): Far too low for total capacity; closer to isolated volumes like Functional Residual Capacity.
  • \( 9 \text{ liters} \) / \( 12 \text{ liters} \): Massively exceed biological human limits; these volumes are seen in large mammals like horses.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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